Valve construction.



. r 27,522. PATENTED JULY 31, 1906. F. W. FBLSBERG. VALVE CONSTRUCTION.

APPLICATION FILED JULY 31, 1905.

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To all whom it may concern."

Be it known that I, FREDERICK FnLsmmmafcitizenof the :United States, residing at Dayton; in the-county of Campbell and StateuofyKentu'cky,- have invented certain :newand useful Improvements; in:Valve Constructions, of which the following is' a full,

1 clean-fiend exact specification.

. --lvlysprescnt invention relates to improvementsinyalvesafor air or gas compressors, and particularly to such valves as are especially adapted. for'use in the ammonia-com- .pressorsof refrigerating and 1ce-mal 1ng mathe construction anduarrangement of the chinery.-'

1+ Thceo-bjectiof the invention is to simplify valve con-trolling.mechanism and also of the means for fastening and adjusting the valves ently ad usting the tension on the wor I .ho1i singin the iniachinec'asing.

In valves for.ammonia-compressors it is E customary} toremple aworking spring, the

tension of which is a justable to obtain a certain definite rateof movement of the valve under different conditions of operation, inasmuch as the duty devolved upon such springs varies in accordance with the pressures in the refri erating system, which are directly dependent upon the temperatures of the con- (lensing medium, the amount of work bein performed by the com ressor, the amount 0 freezing medium in t 1e system,- and other conditions which fluctuate from time to time. To reduce the jar and noise when the valves operate and also to cushion the blow of the valve-disk upon its seat, it has been customary to employ independent cushioning or buffer-springs. These buffer-springs are designed to come into play at a definite part of the valve travel and exert a retarding action upon the valve. It often happens that after the springs have been in use for some time they change their physical condition, thereby producing an improper and imperfect cushioning action upon the valves, permitting them to engage their seats with considerable jar and noise. To remedy this, it has heretofore been necessary to remove the old cushioning-spring and'to replace same by one properly adjusted.

In my improved arrangement it is not nee essary to replace the buffer-spring, as means are 1provided for'varying the relative iosition of t ie abutments between which sail bufferspring operates, so as to bring said spring Application filed J'uly'31. 1905. Serial No. 271.953.

stroke ofthe valve.

.duce the most satisfactory results.

arena as I31, 6.

into play during any desired portion of-the Furthermore, by my improved arrangement it is possible to use thesame size of buffer-spring in valvesem- I ployed with machines of different capacities,

and operating under different pressures. Such an. arrangement also permits the cushioning action to be delicately adjusted to romore, .difliculty has been experienced-in so fastening the valve-housing in position within the casingof the compressor that a gas tight joint'is obtained, while at the same time permitting a ready removal of the valve and -1ts housing from sa d-caslng. i

The invention therefore consists in one of its aspects ofa valve having a working spring and a buffer-spring and means for in ependspring and the limits of action of the; bufi'e spring.

The invention further comprises improve 'ments .in details of construction and combinations'of parts of the valve andlvalve-housing, which will be hereinafter described, and more particularly pointed out in theappended claims.

- In the accompanying drawings, which illustrate the pre erred embodiment of the .invention, Figure 1 is a vertical section through my-improved valve-housirig, showing the valve proper in elevation- 1g. 2 is a plan view of the valve with, the bonnet removed. 7

R'eferrin now to the drawings, the casing of the mac e or compressor'is indicated at 5 and has formed therein the passageway-6, having .the conical seat 7 at the inner end thereof. Against said seat reststhe conical end 8 of the valve-housing 9, which is curel fastened in position, so as to make a gas-tight joint at the se'at"7. Said fastening means comprises theannular member 10,

threaded into the casing'5 at Y11 and ca ingthe independently-adjustable bolts 12,-w 'ch rest against. the shoulder 13 of said valwhousing and .force' said housing tightly against its seat 7. Such a construction admits of the'application of considerable pressure vdirectly: downward upon the valve housing.

The-valve-housing 9 is provided at its innor end with the valve-seat 14, against which seats the valve-disk 15,- carrying the valve- Furt er-' spindle 16. The spindle is reciprocably mounted in and is guided by the diaphra m 17, formed integral with or otherwise rigidly attached .to the valve-housing; Said dia phragm is formed with the "cylindrical ex- '23,- which acts as the movable abutment co.-

acting with the cushioning-spring 20. This abutment 23 is adjustable upon the spindle and is locked place by the jam-nut 24, The position of said abutment on the spindle fixes the point in the stroke of the valve at which the buffer-spring is called into'play,

and therefore. when adjusted varies. the cushioning effect brought to bearupon said valve.

1in 't for" the working spring 19. ai s ut 23'is also threaded at 25 to receive ut 26, which acts as the movable abut- The nut 2-6 icanbe adjusted relative to nut 23 and spindle 1515c vary the tension on the working spring.

ltiwill thus'be seen that the tension on the Working spring 19and the cushioning action of spring ZO-may be independently a usted.

The nut 26 is locked in position by means of the key 27, held in place by screw 28. 'The movable abutments carried by valve-spindle 16 reciprocate freely in the cylindrical extension-Which-acts' as a guide for same and as an additional guide for the vah'e spimlle. The valve-springs and housing are covered by the protecting-bonnet 29,.l'astened lo the casing 5 by means ol bolts 30.

' In' the appended claims "I aim". to cover all modifications of my invention whieh'do not involve a departure from its spirit and scope. Having thus described my im ention, .what I claim as new, and. desire to'see-ure by l: et ters Patent, is I p 1. In combination, a valve, a working spring for said valve, means for adjusting the tension of said spring, a butler-spring For said valve, and means for independently adjusting the limits of action of said buil'ersprin i a 2. In combination, a valve-disk, a valveseat, a spindle attached to said valve-disk, a working spring and a butler-spring surrounding said spindle and supported between a relatively fixed abutment and abntments mounted on said spindle, and means whereby the relative positions of'the abutments on said spindle may be changed so as to adjust independently the tension on the. working spring and the limits of action of 'the bullerspring. a v p In testimony whereof I aflix. my signature in the presence of two witnesses.

, I, FREDERICK WV. FElSBERG. Witnesses:

Enw, h/IOULINIER,

J. S. Louis. 

